What is the constellation of May 7th?

Taurus. Constellations were introduced into China from the west, and the Gregorian calendar is an international calendar, so constellations are calculated according to the Gregorian calendar. The time interval of Taurus is April 2 1 to May 20, and May 7 is in this time period, so May 7 is Taurus. The constellation before Taurus is Aries, and the date of birth is from March 20th to April 20th in the solar calendar. The latter constellation is Gemini, and the date of birth is May 2 1-June 21.